We're dividing 639544 by 3 
Let's see how many times 3 fits into 639544.

Going ahead to step 1:
3 goes into 6 2 times with a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 6 from 6 to get 0.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 3

Moving on to step 2:
If we divide 3 by 3, we get 1 and a remainder of 0.
The next digit of our result is 1. 
Result so far: 21.0
If we subtract 3 from 3, we get 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 3

Advancing to step 3:
The number 3 fits into 9 3 times, leaving a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 213.0
The remainder is 0 after subtracting 9 from 9.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 3

Moving on to step 4:
The number 3 fits into 5 1 times, leaving a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 2131.0
The remainder is 2 after subtracting 3 from 5.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 3

Step 5:
The number 3 fits into 24 8 times, leaving a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 21318.0
If we take 24 away from 24, we end up with 0.
Bring next digit (4) of the dividend behind the 0 and repeat the process: 4 / 3

Moving on to step 6:
3 can be fit into 4 1 times, resulting in a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 213181.0
The remainder is 1 after subtracting 3 from 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
3 goes into 10 3 times with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 213181.3
If we take 9 away from 10, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 8:
If we divide 10 by 3, we get 3 and a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 213181.33
Deduct 9 from 10 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 213181.33, with a leftover of 0.001.